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<pre><span class="sourceLineNo">001</span>/*-<a name="line.1"></a>
<span class="sourceLineNo">002</span> * Copyright 2015, 2016 Diamond Light Source Ltd.<a name="line.2"></a>
<span class="sourceLineNo">003</span> *<a name="line.3"></a>
<span class="sourceLineNo">004</span> * All rights reserved. This program and the accompanying materials<a name="line.4"></a>
<span class="sourceLineNo">005</span> * are made available under the terms of the Eclipse Public License v1.0<a name="line.5"></a>
<span class="sourceLineNo">006</span> * which accompanies this distribution, and is available at<a name="line.6"></a>
<span class="sourceLineNo">007</span> * http://www.eclipse.org/legal/epl-v10.html<a name="line.7"></a>
<span class="sourceLineNo">008</span> */<a name="line.8"></a>
<span class="sourceLineNo">009</span><a name="line.9"></a>
<span class="sourceLineNo">010</span>package org.eclipse.january.dataset;<a name="line.10"></a>
<span class="sourceLineNo">011</span><a name="line.11"></a>
<span class="sourceLineNo">012</span>import java.util.Arrays;<a name="line.12"></a>
<span class="sourceLineNo">013</span>import java.util.EventObject;<a name="line.13"></a>
<span class="sourceLineNo">014</span>import java.util.regex.Matcher;<a name="line.14"></a>
<span class="sourceLineNo">015</span>import java.util.regex.Pattern;<a name="line.15"></a>
<span class="sourceLineNo">016</span><a name="line.16"></a>
<span class="sourceLineNo">017</span>/**<a name="line.17"></a>
<span class="sourceLineNo">018</span> * Event fired to diseminate information about a dataset changing.<a name="line.18"></a>
<span class="sourceLineNo">019</span> * For instance if an image represents a live stream.<a name="line.19"></a>
<span class="sourceLineNo">020</span> * <a name="line.20"></a>
<span class="sourceLineNo">021</span> * This event is passed over web-sockets. To keep dependencies to a <a name="line.21"></a>
<span class="sourceLineNo">022</span> * minimum and since it is really simple, we have added an encode and<a name="line.22"></a>
<span class="sourceLineNo">023</span> * decode to JSON without the need for an API like jackson.<a name="line.23"></a>
<span class="sourceLineNo">024</span> */<a name="line.24"></a>
<span class="sourceLineNo">025</span>public class DataEvent extends EventObject {<a name="line.25"></a>
<span class="sourceLineNo">026</span>        <a name="line.26"></a>
<span class="sourceLineNo">027</span>        /**<a name="line.27"></a>
<span class="sourceLineNo">028</span>         * <a name="line.28"></a>
<span class="sourceLineNo">029</span>         */<a name="line.29"></a>
<span class="sourceLineNo">030</span>        private static final long serialVersionUID = 751125872769278449L;<a name="line.30"></a>
<span class="sourceLineNo">031</span><a name="line.31"></a>
<span class="sourceLineNo">032</span>        private int[]  shape;<a name="line.32"></a>
<span class="sourceLineNo">033</span>        <a name="line.33"></a>
<span class="sourceLineNo">034</span>        /**<a name="line.34"></a>
<span class="sourceLineNo">035</span>         * Optionally, we can indicate where the file path was.<a name="line.35"></a>
<span class="sourceLineNo">036</span>         */<a name="line.36"></a>
<span class="sourceLineNo">037</span>        private String filePath;<a name="line.37"></a>
<span class="sourceLineNo">038</span><a name="line.38"></a>
<span class="sourceLineNo">039</span>        /**<a name="line.39"></a>
<span class="sourceLineNo">040</span>         * The name of the dataset, may be ""<a name="line.40"></a>
<span class="sourceLineNo">041</span>         */<a name="line.41"></a>
<span class="sourceLineNo">042</span>        private String name;<a name="line.42"></a>
<span class="sourceLineNo">043</span><a name="line.43"></a>
<span class="sourceLineNo">044</span>        public DataEvent() {<a name="line.44"></a>
<span class="sourceLineNo">045</span>                this("", new int[]{1});<a name="line.45"></a>
<span class="sourceLineNo">046</span>        }<a name="line.46"></a>
<span class="sourceLineNo">047</span><a name="line.47"></a>
<span class="sourceLineNo">048</span>        /**<a name="line.48"></a>
<span class="sourceLineNo">049</span>         * Creates an event to notify that this data has changed.<a name="line.49"></a>
<span class="sourceLineNo">050</span>         * @param name<a name="line.50"></a>
<span class="sourceLineNo">051</span>         */<a name="line.51"></a>
<span class="sourceLineNo">052</span>        public DataEvent(String name, int[] shape) {<a name="line.52"></a>
<span class="sourceLineNo">053</span>                super(name);<a name="line.53"></a>
<span class="sourceLineNo">054</span>                this.shape = shape;<a name="line.54"></a>
<span class="sourceLineNo">055</span>                this.name  = name;<a name="line.55"></a>
<span class="sourceLineNo">056</span>        }<a name="line.56"></a>
<span class="sourceLineNo">057</span><a name="line.57"></a>
<span class="sourceLineNo">058</span>        @Override<a name="line.58"></a>
<span class="sourceLineNo">059</span>        public String getSource() {<a name="line.59"></a>
<span class="sourceLineNo">060</span>                return (String)super.getSource();<a name="line.60"></a>
<span class="sourceLineNo">061</span>        }<a name="line.61"></a>
<span class="sourceLineNo">062</span>        <a name="line.62"></a>
<span class="sourceLineNo">063</span>        public String getName() {<a name="line.63"></a>
<span class="sourceLineNo">064</span>                return getSource();<a name="line.64"></a>
<span class="sourceLineNo">065</span>        }<a name="line.65"></a>
<span class="sourceLineNo">066</span>        <a name="line.66"></a>
<span class="sourceLineNo">067</span>        public void setName(String name) {<a name="line.67"></a>
<span class="sourceLineNo">068</span>                this.name = name;<a name="line.68"></a>
<span class="sourceLineNo">069</span>        }<a name="line.69"></a>
<span class="sourceLineNo">070</span>        <a name="line.70"></a>
<span class="sourceLineNo">071</span>        public int[] getShape() {<a name="line.71"></a>
<span class="sourceLineNo">072</span>                return shape;<a name="line.72"></a>
<span class="sourceLineNo">073</span>        }<a name="line.73"></a>
<span class="sourceLineNo">074</span><a name="line.74"></a>
<span class="sourceLineNo">075</span>        public void setShape(int[] shape) {<a name="line.75"></a>
<span class="sourceLineNo">076</span>                this.shape = shape;<a name="line.76"></a>
<span class="sourceLineNo">077</span>        }<a name="line.77"></a>
<span class="sourceLineNo">078</span><a name="line.78"></a>
<span class="sourceLineNo">079</span>        public String getFilePath() {<a name="line.79"></a>
<span class="sourceLineNo">080</span>                return filePath;<a name="line.80"></a>
<span class="sourceLineNo">081</span>        }<a name="line.81"></a>
<span class="sourceLineNo">082</span><a name="line.82"></a>
<span class="sourceLineNo">083</span>        public void setFilePath(String filePath) {<a name="line.83"></a>
<span class="sourceLineNo">084</span>                this.filePath = filePath;<a name="line.84"></a>
<span class="sourceLineNo">085</span>        }<a name="line.85"></a>
<span class="sourceLineNo">086</span><a name="line.86"></a>
<span class="sourceLineNo">087</span>        /**<a name="line.87"></a>
<span class="sourceLineNo">088</span>         * Encodes event to string<a name="line.88"></a>
<span class="sourceLineNo">089</span>         * @return encoded string<a name="line.89"></a>
<span class="sourceLineNo">090</span>         */<a name="line.90"></a>
<span class="sourceLineNo">091</span>        public String encode() {<a name="line.91"></a>
<span class="sourceLineNo">092</span>                final StringBuilder buf = new StringBuilder();<a name="line.92"></a>
<span class="sourceLineNo">093</span>                buf.append("{");<a name="line.93"></a>
<span class="sourceLineNo">094</span>                buf.append("\"name\" : \"");<a name="line.94"></a>
<span class="sourceLineNo">095</span>                buf.append(getName());<a name="line.95"></a>
<span class="sourceLineNo">096</span>                buf.append("\"");<a name="line.96"></a>
<span class="sourceLineNo">097</span>                buf.append(", \"shape\" : ");<a name="line.97"></a>
<span class="sourceLineNo">098</span>                buf.append(Arrays.toString(shape));<a name="line.98"></a>
<span class="sourceLineNo">099</span>                <a name="line.99"></a>
<span class="sourceLineNo">100</span>                buf.append(", \"filepath\" : \"");<a name="line.100"></a>
<span class="sourceLineNo">101</span>                buf.append(getFilePath());<a name="line.101"></a>
<span class="sourceLineNo">102</span>                buf.append("\"");<a name="line.102"></a>
<span class="sourceLineNo">103</span>                <a name="line.103"></a>
<span class="sourceLineNo">104</span>                buf.append("}");<a name="line.104"></a>
<span class="sourceLineNo">105</span>                return buf.toString();<a name="line.105"></a>
<span class="sourceLineNo">106</span>        }<a name="line.106"></a>
<span class="sourceLineNo">107</span>        <a name="line.107"></a>
<span class="sourceLineNo">108</span>        /**<a name="line.108"></a>
<span class="sourceLineNo">109</span>         * Decodes from String for instance {"name" : "Tests", "shape" : [1024, 1024], "filepath" : "C:/tmp/Fred.txt"}<a name="line.109"></a>
<span class="sourceLineNo">110</span>         * @return DataEvent<a name="line.110"></a>
<span class="sourceLineNo">111</span>         */<a name="line.111"></a>
<span class="sourceLineNo">112</span>        public static DataEvent decode(String json) {<a name="line.112"></a>
<span class="sourceLineNo">113</span>                <a name="line.113"></a>
<span class="sourceLineNo">114</span>                String name     = getValue(json, ".*\"name\" \\: \"([^\"]+)\".*");<a name="line.114"></a>
<span class="sourceLineNo">115</span>                String filepath = getValue(json, ".*\"filepath\" \\: \"([^\"]+)\".*");<a name="line.115"></a>
<span class="sourceLineNo">116</span>                String shape    = getValue(json, ".*\"shape\" \\: \\[([^\\]]+)\\].*");<a name="line.116"></a>
<span class="sourceLineNo">117</span><a name="line.117"></a>
<span class="sourceLineNo">118</span>                DataEvent ret = new DataEvent(name, getArray(shape));<a name="line.118"></a>
<span class="sourceLineNo">119</span>                if (filepath!=null &amp;&amp; !"null".equals(filepath)) {<a name="line.119"></a>
<span class="sourceLineNo">120</span>                        ret.setFilePath(filepath);<a name="line.120"></a>
<span class="sourceLineNo">121</span>                }<a name="line.121"></a>
<span class="sourceLineNo">122</span>                return ret;<a name="line.122"></a>
<span class="sourceLineNo">123</span>        }<a name="line.123"></a>
<span class="sourceLineNo">124</span><a name="line.124"></a>
<span class="sourceLineNo">125</span><a name="line.125"></a>
<span class="sourceLineNo">126</span>        private static String getValue(String json, String regex) {<a name="line.126"></a>
<span class="sourceLineNo">127</span>                Matcher matcher = Pattern.compile(regex).matcher(json);<a name="line.127"></a>
<span class="sourceLineNo">128</span>                if (matcher.matches()) {<a name="line.128"></a>
<span class="sourceLineNo">129</span>                        return matcher.group(1);<a name="line.129"></a>
<span class="sourceLineNo">130</span>                }<a name="line.130"></a>
<span class="sourceLineNo">131</span>                throw new RuntimeException(regex+" unmatched in "+json);<a name="line.131"></a>
<span class="sourceLineNo">132</span>        }<a name="line.132"></a>
<span class="sourceLineNo">133</span><a name="line.133"></a>
<span class="sourceLineNo">134</span>        private static int[] getArray(String value) {<a name="line.134"></a>
<span class="sourceLineNo">135</span>                String[] split = value.split(",");<a name="line.135"></a>
<span class="sourceLineNo">136</span>                int[] ret      = new int[split.length];<a name="line.136"></a>
<span class="sourceLineNo">137</span>                for (int i = 0; i &lt; split.length; i++) ret[i] = Integer.parseInt(split[i].trim());<a name="line.137"></a>
<span class="sourceLineNo">138</span>                return ret;<a name="line.138"></a>
<span class="sourceLineNo">139</span>        }<a name="line.139"></a>
<span class="sourceLineNo">140</span><a name="line.140"></a>
<span class="sourceLineNo">141</span>        @Override<a name="line.141"></a>
<span class="sourceLineNo">142</span>        public int hashCode() {<a name="line.142"></a>
<span class="sourceLineNo">143</span>                final int prime = 31;<a name="line.143"></a>
<span class="sourceLineNo">144</span>                int result = 1;<a name="line.144"></a>
<span class="sourceLineNo">145</span>                result = prime * result + ((filePath == null) ? 0 : filePath.hashCode());<a name="line.145"></a>
<span class="sourceLineNo">146</span>                result = prime * result + ((name == null) ? 0 : name.hashCode());<a name="line.146"></a>
<span class="sourceLineNo">147</span>                result = prime * result + Arrays.hashCode(shape);<a name="line.147"></a>
<span class="sourceLineNo">148</span>                return result;<a name="line.148"></a>
<span class="sourceLineNo">149</span>        }<a name="line.149"></a>
<span class="sourceLineNo">150</span><a name="line.150"></a>
<span class="sourceLineNo">151</span>        @Override<a name="line.151"></a>
<span class="sourceLineNo">152</span>        public boolean equals(Object obj) {<a name="line.152"></a>
<span class="sourceLineNo">153</span>                if (this == obj)<a name="line.153"></a>
<span class="sourceLineNo">154</span>                        return true;<a name="line.154"></a>
<span class="sourceLineNo">155</span>                if (obj == null)<a name="line.155"></a>
<span class="sourceLineNo">156</span>                        return false;<a name="line.156"></a>
<span class="sourceLineNo">157</span>                if (getClass() != obj.getClass())<a name="line.157"></a>
<span class="sourceLineNo">158</span>                        return false;<a name="line.158"></a>
<span class="sourceLineNo">159</span>                DataEvent other = (DataEvent) obj;<a name="line.159"></a>
<span class="sourceLineNo">160</span>                if (filePath == null) {<a name="line.160"></a>
<span class="sourceLineNo">161</span>                        if (other.filePath != null)<a name="line.161"></a>
<span class="sourceLineNo">162</span>                                return false;<a name="line.162"></a>
<span class="sourceLineNo">163</span>                } else if (!filePath.equals(other.filePath))<a name="line.163"></a>
<span class="sourceLineNo">164</span>                        return false;<a name="line.164"></a>
<span class="sourceLineNo">165</span>                if (name == null) {<a name="line.165"></a>
<span class="sourceLineNo">166</span>                        if (other.name != null)<a name="line.166"></a>
<span class="sourceLineNo">167</span>                                return false;<a name="line.167"></a>
<span class="sourceLineNo">168</span>                } else if (!name.equals(other.name))<a name="line.168"></a>
<span class="sourceLineNo">169</span>                        return false;<a name="line.169"></a>
<span class="sourceLineNo">170</span>                if (!Arrays.equals(shape, other.shape))<a name="line.170"></a>
<span class="sourceLineNo">171</span>                        return false;<a name="line.171"></a>
<span class="sourceLineNo">172</span>                return true;<a name="line.172"></a>
<span class="sourceLineNo">173</span>        }<a name="line.173"></a>
<span class="sourceLineNo">174</span><a name="line.174"></a>
<span class="sourceLineNo">175</span>}<a name="line.175"></a>




























































</pre>
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